50 Toyota diagnostic codes on file. Each shows the symptom for free — unlock the full diagnosis, repair steps, and field insights with a free account.
| Code | System | Symptom | Fix |
|---|---|---|---|
| B1100 | SRS / Restraints | SRS Light Stays Lit / No Deployment | Unlock |
| B1402 | HVAC / Climate | A/C Blows Hot / Flashing A/C LED | Unlock |
| B1421 | Climate Control (HVAC) | Check Engine Light / AC Light Blinks | Unlock |
| B1421 | Climate / Sensors | Stored Historical DTC in A/C Module | Unlock |
| B1801 | SRS / Airbag | SRS Warning Light Solid on Cluster | Unlock |
| B2799 | Immobilizer | Engine Cranks No Start / Security On | Unlock |
| B279A | Anti-Theft / Immobilizer | Crank No Start / Security Light On | Unlock |
| B2A60 | Climate Control (HVAC) | Passenger Side Blows Only Cold Air | Unlock |
| C1200 | Braking / ABS | ABS Warning Light / 4WD Interrupted | Unlock |
| C1201 | Braking | ABS/VSC Light | Unlock |
| C1233 | Braking | ABS/TRAC Light | Unlock |
| C1555 | Steering | Heavy Steering | Unlock |
| P0045 | Air Intake | No Boost / Sluggish / Check Engine | Unlock |
| P0045 | — | "Limp Home" mode; Turbo lacks "spool" sound; Significant power loss; VSC/TRC lights may trigger. | Unlock |
| P0087 | Fuel System | White Smoke / No Start | Unlock |
| P0087 | Fuel System | Engine Cuts Out During Full Acceleration | Unlock |
| P0087 | Fuel | Engine stalls under load; Limp mode; Hard starting. | Unlock |
| P0088 | — | Engine "knocking" sound; Sudden shutdown; Rail pressure gauge (if equipped) pins high. | Unlock |
| P0093 | Fuel System | Engine Limp Mode / Cuts Out Under Load | Unlock |
| P0093 | — | Severe power loss; Engine stalls under load; Large fuel leak detected warning. | Unlock |
| P0093 | Fuel | Severe power loss; Engine may shut down while driving. | Unlock |
| P0191 | Fuel System | Limp Mode / Surge. Engine lacks power under load; Rail pressure erratic. | Unlock |
| P0304 | Ignition | Rough Run / Flashing MIL | Unlock |
| P0341 | — | Long cranking time; Intermittent stalling; Tachometer "bouncing." | Unlock |
| P0400 | — | Black smoke; Rough idle; Hesitation; EGR cooler whistling sound. | Unlock |
| P0401 | Emissions / EGR | Engine Pinging / Hesitation at Cruise | Unlock |
| P0401 | Emissions | CEL on; Reduced power; Excessive smoke. | Unlock |
| P0420 | Emissions | Check Engine / Trac Off | Unlock |
| P0455 / P0456 | Emissions | Fuel smell near rear; CEL after refueling. | Unlock |
| P0500 | Drivetrain | Erratic Shift / No Speedo | Unlock |
| P0500 | Speed | Speedo not working; ABS light on. | Unlock |
| P0500 | — | Speedometer is dead; ABS light on; Automatic transmission won't shift out of 1st. | Unlock |
| P0500 | Vehicle Speed | Speedometer Dead / Hard ABS Light | Unlock |
| P0562 | Electrical | Alternator Lamp / Multiple False Sensor Faults | Unlock |
| P0607 | Computer | VSC Light / Immediate Engine Stall | Unlock |
| P0A80 | Hybrid Drive | Check Hybrid System / Performance Drop | Unlock |
| P0A80 | Hybrid Drive | Hybrid System Warning / Performance Drop | Unlock |
| P0A80 | Hybrid Drive | Hybrid System Warning / Performance Drop | Unlock |
| P1264 | — | Engine misfire; Rough running; White smoke; Loss of power. | Unlock |
| P1349 | VVT | Rough idle; Engine stalling at stoplights; Poor MPG. | Unlock |
| P1415 / P1416 | Fuel | Hard starting in heat; Loss of power. | Unlock |
| P1601 | — | Check engine light; No driveability symptoms but code won't clear. | Unlock |
| P1604 | Starting / Engine | Engine Cranks Long / Intermittent Stall | Unlock |
| P244B | Emissions / DPF | DPF Full Warning / High Fuel Consumption | Unlock |
| P2458 | — | Frequent DPF warning; Engine derate; Fuel smell in oil. | Unlock |
| P2463 | Emissions / DPF | DPF Warning Lamp / Limp Mode Active | Unlock |
| P24AF | Aftertreatment | DPF Warning / Limp Mode | Unlock |
| P2588 | — | Turbo surging; Flat spots in acceleration; VNT actuator buzzing. | Unlock |
| Service Light Indicator | — | — | Unlock |
| U0121 | Network | ABS/VSC Lights On | Unlock |
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